Last week, The Hollywood Reporter reported that Sheen will soon be Tweeting endorsements.

Lady Gaga currently has the most followers -- more than 8.6 million -- followed by Justin Bieber, Britney Spears and President Barack Obama.

Sheen is catching up, though.

Not only is he thriving on Twitter, he is heating up other parts of the web: On Saturday, he hosted a live webcast and attracted more than 100,000 viewers. He showed off a new tattoo on his left wrist that reads “winning.”